Although passengers have been required to remove larger electronic devices, such as laptops, from their carry-on luggage for a while now, the TSA is now asking travelers to remove books, too.

According to the Wall Street Journal, it is part of a new method of baggage screening that the TSA is testing out, though it may become permanent.

The new rules require travelers to remove all food items and electronics larger than cell phones from carry-on bags and put them in a separate security bin, similar to how laptops are currently being screened. However, in airports that have been testing the new security measures, passengers have also reported being asked to remove all books, magazines, and even Post-It Notes from their carry-ons.

TSA agents then fan through each page.

The new practice has some worrying it could lead to agents discriminating against passengers traveling with books that have certain political or religious content, however, TSA official Carrie Harmon told The Sacramento Bee that screeners are not checking to see what people are reading.

A former deputy administrator of the TSA, John Slinks, told NBC that part of the reason for trying the new screening process was to make it easier to "discern what is a threat and what's not a threat."

Although removing more items from your bags may slow things down in the short term, TSA agents argue that removing objects, such as books, from your carry-on helps them scan items more quickly, and will expedite the process in the long run.

The Department of Homeland Security Secretary, John Kelly, told Fox News the new searches are likely to spread to airports nationwide.

The new screening methods exclude TSA PreCheck lanes, a service passengers can sign up for to get through airport security faster.